If引导的条件状语从句课件

If引导的条件状语从句大庆市第51中学贺东辉If在状语从句中的位置If引导的条件状语从句，如下列的例子：Ifyouknowtheanswer,pleasetellme.Iftheycomehere,wewillpickthemup.ShewillsendmeanemailifInoticeher.*由此可以看出，if引导的句子放在句首，后面的句子连接中用“，”

.如果放在句子当中，两个连接的句子不需要加“，”.eg:1)如果你看见Tom,请立刻通知我。2)如果比赛结束了，请给我打电话。1)IfyouseeTom,pleasenoticemeatonce.1)PleasenoticemeatonceifyouseeTom.2)Ifthegameisover,pleasecallme.2)Pleasecallmeifthegameisover.exercise：句子改写WewillgotoHarbinifitisfinetomorrow.

*Ifitisfinetomorrow,wewillgotoHarbin2)Ifhehasthebook,pleaseletmeknow.*Pleaseletmeknowifhehasthebook.3)Iftheycomehere,wewillbehappy.*

Wewillbehappyiftheycomehere4)Katewillwatchamovieifsheisfree.*IfKateisfree,shewillwatchamovie.*question:if在状语从句中的位置是怎样的呢主从句的区分Eg:Iwillbringanumbrellaifitrainsoutside.Ifthecarisred,Iwillbuytwo.Ifthegroundisdry,wewillplayfootballthisafternoon.*上述句子中，我们把if后面引导的句子叫做从句，句子的另外一部分叫做主句。If叫引导词。判断下列句子中的主句和从句Ifyouhaveenoughmoney,wewillbuyacar.IfKateisangry,Tomwillbeveryscared.Wewilllaughathimifhegetspoorscore.Pleasegohomeifyouhaveanyproblem.Turnleftifyouseetheredstone.*1)从+主2）从+主3）主+从4）主+从

5）主+从

Question:if引导的句子叫什么？另外一部分叫什么？If引导的条件状语从句1IfyouseeTom,pleasetellhimthenews.IfIcan’tgothere,pleasechooseanotherone.Handinyourpaper

iftimeisup.Gobackrightnow

ifyoufeeltired.Question:这几个if引导的条件状语从句有什么特点？If引导的状语从句之祈使句上述的例子概况为

If+从句+主句（祈使句）或者

主句（祈使句）+if+从句即：在主句和从句都是一般现在时态的情况下，主句用祈使句，从句用一般现在时。Eg:Passmetherulerifyouarefree.Ifthecarischeap,buyme2.ChoosethebestanswerIfMary____(want)toeatsth,_____(give)heratonce.A.want,giveB.wants,giveC.wants,givesD.want,gives2.IfTony___(have)time,____(go)shoppingwithhim.A.have,goB.has,goC.has,goesD.have,goes3.__(remember)allthewordsifhe___(find)thebook.A.Remember,findB.Remembers,findsC.Remembers,findD.Remember,findsFillintheblankIfIcan’t____(get)upontime,_____(call)meplease.IfKate______(be)singing,_____(notice)hertogetdownatonce.Ifshe_____(know)theanswer,_____(copy)meone.______(cut)thewatermelonifalltheguests______(be)ready.______(turn)offthelightifshe____(go)out.getcallisnoticeknowscopyCutareTurngoesIf引导的状语从句之主将从现

看下面的句子,Ifyoucancomehere,

bringmeabook.

表示的是一种可能的情况。在这个句子中，主句用祈使句，从句用一般现在时态。可是如果句子说，“如果你不能来，我会自己去取”，该怎么表达呢？*Ifyoucan’tcomehere,Iwillbringitmyself.

像这种从句用一般现在时，主句用将来时态的句子，就是if引导的第二种条件状语的情况，简称“主将从现”。Eg:Ifyoutellmethetruth,Iwillbecrazy.Ifshecomeshere,Iwillhavelunchwithher.Wewilltakeyouhomeifourcarisworking.Hewillsmokeifthereisnobody.Choosethebestanswer.IfMary____(fly)toShanghai,she____(see)myuncle.A.fly，willseeB.flies,willseeC.willfly,sees,D.flies,see2.IfTom____(open)thebox,father____(be)angry.A.opens,willbeB.willopen,beC.opens,isD.willopen,willbe3.Daming____(cook)themealhimselfifmum____(be)notathome.cook,isB.willcook,willbeC.willcook,isD.cook,willbeFillintheblankIfI_______(see)them,I_______(tell)themtheresult.Ifit________(snow),we_______(go)skating.Tony_______(play)footballifit_______(be)notcold.We_______(get)thefirstplaceifnobody________(catch)us.They__________(win)ifthegame________(be)over.Question:什么叫“主将从现”？seewilltellsnowswillgowillplayiswillgetcatcheswillwinis主将从现练习IfI____(have)enoughmoney,I_____(buy)anicecar.A.have,buyB.willhave,willbuyC.willhave,buy.D.have,willbuy.Ifshe_____(read)thenotice,she______(notmake)themistake.A.read,doesn’tmakeB.willread,won’tmakeC.willread,won’tmakeD.reads,won’tmakeMary_____(notgo)thereifnobody_____(tell)hertheaddress.A.doesn’tgo,tells.B.won’tgo,tellsC.doesn’tgo,willtellD.won’tgo,tell改错Iftheyknowtheanswer,theytellmehowtodo.Iwillcookmyselfifshewillgoout.WewillflytoShanghaiifthedaywasfine.Mikewillgohomeifthereisnothomework.Shecopiesitagainifthebossgoesback.Davidwilleatalotofwatermelonsifhefeelhungry.

1.willtell2.goes3.is4.no5.willcopy6.feelstranslation如果你看到Tom，你就会知道真相了。如果有人跟我撒谎，我就揍他。如果你飞到月球上，你就会看到蓝色的地球。如果你在伦敦，你就会看奥运会了。如果你能早点到，我们就不会错过